This is a background task that is installed with various telephony software products. It detects if you have a digital phone line (such as those used in offices) connected to your modem, as opposed to a standard analog line, since most modems won't work properly on digital lines. It is not generally needed on most modern PCs, especially since you should already know if you are using your modem, and if so, where and on what type of line.

If you want a detailed security rating about your DLG.exe (and all other running background processes) read the following user opinions, and download the free trial version of Security Task Manager.

Note: Any malware can be named anything - so you should check where the files of the running processes are located on your disk.
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Users Opinions

Average user rating of DLG.exe:
based on 26 votes. Read also the 20 reviews.

2599 users ask for this file.
15 users rated it as not dangerous.
3 users rated it as not so dangerous.
4 users rated it as neutral.
2 users rated it as little bit dangerous.
2 users rated it as dangerous.
3 users didn't rate it ("don't know").

All comments about DLG.exe:

Came with Dell laptop to support Broadcom modem. It checks on boot and periodically if you are plugged into a digital PBX plug instead of an analog modem plug. I presume that it is attempting to protect itself as this situation used to destroy modem cards years ago. I think that most modern modems have some sort of protection now. Don

Conflicts with Logitech Mouseware 9.79.1. Advice from Logitech support was to "Either (a) Delete the Digital Line Detect program from the start up folder, or (b) If the issue persists, please uninstall the Digital Line Detect program" Owen Williams

this File causes problems with live meeting and can bring up error msgs "digital line found (PBX) please check the phone line connected to your pc" ( no line is connected) ((translation from german OS)) ulrich bär

dlg.exe is a part of BVRP Phone Tools software suite. It offers faxing, phone book, e-mailing and more. This is a non-essential process. Disabling or enabling this is down to user preference Elric Ward

makes sure you don't "hurt" tour pc if connected to a digital ( not alalog) telephone line ! jenzendk

Used by Dell Computers (installed by default). It may be conflicting with Logitech Remote Mouse". There is less evidence of conflict with "Logitech MX3000 Remote Keyboard" Michael B

Comes with lenovo ThinkPad Dizzman

Microsoft's process explorer, reports the exe as:"The Digital Line Detection program monitors the modem to make sure that the phone line is a standard analog phone line. Plugging into a digital phone line could cause damage to the modem.The purpose of this application is to provide a warning before damage occurs." drWireMore

AFAIK- serves no purpose. I used MSCONFIG and disabled it from starting up. Another Annoyed Dell Customer

It saved a bunch oof porn that wasn't even my taste to the computer then it did skeet on my face See also: LinkSkeetface

This file message "Digital Line detected" would come up because QTtask.exe would try to link for update when no network was hooked up. Using 98% of system the Quicktime file would try to connect through modem too. Recommend disabling auto update checkbox in QT. Other apps may be doing the same thing. Bob